Lamp holder and switch



(NoModeL) C.H. HBRRIGK. u LAMPVHQLDER'AND SWITCH. No. 435,931.

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UNITED STATES PATENT OFFICE.

CHARLES H. IIERRICK, OF VINCHESTER, MASSACHUSETTS.

LAMP HOLDER AND SWITCH.

SPECIFICATION forming part of Letters Patent No. 435,931, dated September 9,1890.

Application filed May 16, 1890- Serial No. 352,056. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES II. IIERRICK, of Winchester, county of Middlesex, State of Massachusetts, have in vented an Improvement in Incandescent- Lamp Holders and Switches, of which the following description, in connection with the accompanying drawings, is aspecification, like letters on the draw ings representing like parts.

This invention relates to incandescentlamp switches or cut-outs employinga rotating spindle to close and break the circuit, and has for its object toimprove and simplify the construction and operation of the same.

In accordance with this invention the spindle is mounted in two supports, which may serve as electrodes of the lamp, held rigidly between two disks or heads of insulating material, one of the journals of said spindle being insulated therefrom, the spring-pens which co-operate with the spindle to make and break the circuit and hold the spindle in one or another position being supported at both ends by the disks or heads referred to.

One part of my invention therefore consists in the combination, with the head and supports carried thereby, of a spindle mounted in said supports and an insulated journal for said spindle, substantially as will be described; also, in the combination, with the heads, the spindle, and supports therefor, of a contact-pen supported at each end for said spindle, substantially as will be described.

Other features of my invention will be here inafter pointed out in the claims at the end of this specification.

Figure 1, in side elevation, partially broken away, shows a suiiicient portion of an incandescent-lamp holder and switch to enable my invention to be understood; Fig. 2, a right hand end view of the same; Fig. 3, a crosssection 011 dotted line a: as; Fig. 4, a vertical section on dotted line 00 at, Fig. 1; and Fig. a perspective detail to be referred to.

Referring to the drawings, the disks or heads a a, of insulating material, support between them the metallic posts a a one of which, as a, receives at its upper end a binding-screw a and at its lower end a screw 0;, passed through the head a from the metallic contact-ring (t on the under side thereof, as shown in Fig. 1. A spindle b is mounted to rotate in the posts a a one of its journals 1) being of insulating material, while its other journal 11 is preferably of metal forming the shank of the said spindle, on which is mounted a suitable handle b the said shank inside the post a being forked (see Figs. 3, 4, and 5) to receive the insulated segments b forming a cylindrical head presenting two diametrically-opposite conducting-segments 10, connected together, and two opposite intervening segments 12, of insulating material, each provided with a longitudinal groove to receive the projection 15 on the spring-pen c, secured at each end to the heads a, (see Fig. 4,) a similar pen 0, but preferably without the projection 15, bearing upon the opposite side of thehead Z), said pen 0 being shaped, as shown, to receive the shank of the metallic screwthreaded stud c 011 which the lamp-bulb containing the filament is screwed, said stud forming one conductor to the filament and the ring a forming the other conductor. The springpen a (see Fig. 4) at its lower end is connected to the block a having abinding-screw 0 A suitable cap 0 is secured to the upper head or disk a, to which is fastened in any usual way a shell e, covering the operating parts, the shank b of the spindle with its handle Z1 alone protruding. One of the wires leading to the lamp is secured to the block 0 by the binding-screw 0 the current then passing through the pen 0, segments of the spindle, pen 0, stud 0 through the filament, returning through the ring a screw a, post a to the binding-screw a thence to the line again, or vice versa, entering at a and leaving at 13y rotating the spindle one-quarter of a turn the insulation-segments 12 are brought between the two pens c 0, thus interrupting the circuit and cutting out the lamp, every quarter-turn of the spindle alter nately cutting the lamp in or out, the projection 15 looking the spindle frictionally in either position. The spring-pens c 0 being supported at each end, danger of their becoming set is entirely obviated, and, if desired, both of the pens may be provided with a projection 15 to lock the spindle more firmly, or the projections may be upon the spindle and the depressions upon the pens.

I have herein shown my invention as applied to one well-known form of lamp, but the same is applicable to any other form of lamp as well,the post a being in each case connected to one of the electrodes, and the spring-pen c to the other.

I do not desire to limit myinvention to the particular construction shown, as the same may be varied without departing from the scope of this invention.

I claim- 1. The head a, a rotatable metallic spindle, and a support through which the shank of the said spindle passes to receive outside thereof a handle, the said spindle having a portion of insulating material on which is formed a journal, and a support for said journal, which support also serves as a conductor, combined with a contact-pen bearing upon the said spindie, the said contact-pen and spindle being included in the line, substantially as described. 2. The combination, with the heads a, the spindle b, and supports therefor, of a contactpen supported at each end for the spindle, substantially as described.

3. The head a, the spindle b, grooved longitudinally and having an insulated journal, a support, which is also an electrode, having a bearing for said journal, combined with a pen for said spindle, forming the other electrode supported at each end, and. provided with a projection adapted to enter said grooves, substantially as described.

4. The head a, the spindle 5, having an insulated journal, a support which is also an electrode having a bearing for said journal, combined with two pens supported at each end and bearing upon said spindle at oppo site sides thereof, substantially as described.

5. The head 00, supports a a carried thereby, a rotatable spindle mounted in said supports and consisting of a forked conducting portion 1) and an interposed portion b of insulating material, having formed upon it a journal having its bearing in one of the sup ports a a combined with a contact-pen bearing upon said spindle, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHAS. H. HERRICK. Witnesses:

EREDERIOK L. EMERY, BERNICE J. NOYES. 

